Primer for blasting-fuses



(No Model.)

J. H. HART.

PRIMER FOR BLASTING FUSES. No. 569,871. Patented Oct. 20, 1896.

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w: mums PETERs on wow-um UNITED STATES PATENT OFFICE.

JAMES H. HART, OF MEADERVILLE, MONTANA.

PRIMER FOR BLASTlNG-FUSES.

SPECIFICATION forming part of Letters Patent N 0. 569,871, dated October20, 1896. Application filed October 14, 1895- Serial No. 565,584. (Nomodel.)

To all whom it may concern.-

Be it known that I, JAMES H. HART, of Meaderville, in the county ofSilver Bow and State of Montana, have invented a new and ImprovedFuse-Igniter, of which the following is a full, clear, and exactdescription.

The object of this invention is to provide a superior igniter for fusesand one especially adapted for use in Wet mines. I attain this end bymeans of a sleeve capable of embracing the end of the fuse and having inits outer end a cap or primer, the sleeve being braced by a head whichincloses that part having the cap or primer, so that the explosion ofthe cap will not result in a rupture of the sleeve.

The invention will be fully described hereinafter, and then defined inthe claim.

Reference is to be had to the accompanying drawing, which represents asectional View of my invention.

The fuse 16 may be of any known construction; and the igniter consistsin a sleeve 15, receiving the end of the fuse and having at its outerend a frusto-conical head 15. The

outer end of the sleeve 15 projects slightly beyond the end of the fuse,and a cap or primer l sleeve.

The invention is adapted for use with any is fitted within this end ofthe suitable device by which the cap or primer may be fired. The purposeof the head 15 is to permit holding the igniter firmly While the cap orprimer is being fired.

The device may be made separately from the fuse and applied to the fusewhenever desired, or each fuse may be supplied with one of the ignitingdevices.

It is also a purpose of the head 15 to strengthen the sleeve 15 andprevent the explosion of the cap or primer from bursting the sleeve.

Having thus described my invention, Iclaim as new and desire to secureby Letters Patent- Afuse-igniter consisting of asleeve capable ofembracing the end of the fuse, a cap or primer secured in one end of thesleeve and capable of lying adjacent to the end of the fuse, and a headsecured to the outer side of the sleeve and around that portion whichreceives the cap, the head being capable of strengthening the sleeve,substantially as described.

JAMES H. HART.

Witnesses:

JOHN R. RENFREY, JAMES TIcKELL.

